.product-imgs{
    padding: 40px 20px 25px 20px;
    overflow: hidden;
}
.product-imgs li{
    width: 280px;
    height: 213px;
    float: left;
    position: relative;
    margin-bottom: 40px;
    margin-right: 40px;
}
.product-imgs li:nth-child(3n){
    margin-right: 0;
}
.product-imgs li span{
    display: block;
    width: 280px;
    text-align: center;
    position: absolute;
    bottom: 0;
    background-color: rgba(0,0,0,0.4);
    padding: 8px 0;
    color: #fff;
}
.product-imgs li:hover{
    box-shadow: 1px 1px 8px #0aa1ff;
}
.product-imgs li:hover span{
    background-color: #01a1ff;
}